{"id":4269940,"url":"https://alion.io/job/kubo-senior-c-developer","title":"Senior C++ Developer","company":{"id":4079540,"name":"Kubo","domain":"kubo.io","url":"https://alion.io/company/kubo-io","size_band":null,"is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Gothenburg, Sweden"],"countries":["SE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"GraphQL","optional":false},{"name":"Python","optional":false}],"status":"live","first_seen_at":"2026-11-13T15:47:41Z","employer_posted_date":null,"last_verified_at":"2026-11-13T15:47:41Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Ready to rethink how large volumes of data move through real-time systems? Our client develops technology addressing the needs of the airline industry, with projects involving AI. As a Senior C++ Backend Engineer, you'll help transform a multilayer C++, SWIG and Python backend into a native C++ solution, improving how data is processed, transferred and cached. If you enjoy solving demanding performance challenges and shaping efficient backend systems, this role could be your next challenge!\n\nKey responsibilities\n\nRedesign and develop a backend architecture, moving from a multilayer C++, SWIG and Python stack towards native C++.\n\nDesign and optimise data flows for processing and transferring large volumes of data in real time.\n\nBuild backend components that support high throughput and low latency.\n\nIdentify and resolve performance bottlenecks across data processing and transfer.\n\nDevelop and optimise local caching mechanisms to improve data access and system responsiveness.\n\nCollaborate with the team to make technical decisions and deliver a maintainable backend solution.\n\nIdeal candidate profile\n\nExtensive expertise in C++ and backend development\n\nProven experience designing and optimising data flows for large-scale data processing and transfer.\n\nStrong understanding of real-time systems, high-throughput architectures and low-latency performance.\n\nPractical experience with local caching mechanisms and their performance trade-offs.\n\nFamiliarity with technologies such as GraphQL and their use in backend systems.\n\nFluency in English.\n\nConditions\n\nLocation: Gothenburg, Sweden,\n\nWork model: Flexible hybrid arrangement, with approximately two weeks on-site initially, followed by a few days per month.\n\nContract: Regular employment or B2B.\n\nRate: 200-360 PLN/h\n\nRecruitment steps\n\nInitial call with a KUBO recruiter to discuss your experience, strengths and development interests.\n\nInterview with the client (a few rounds may be required).\n\nDecision and feedback.\n\nAt KUBO, we genuinely care about people. We welcome candidates of all ages, backgrounds, identities, family constellations, health situations, and ways of thinking and interacting with the world. You’re welcome to be yourself. We value authenticity, and we’re committed to creating a fair and inclusive process for everyone.\nTech stack\nC++\nGraphQL","description_format":"text","description_chars":2334,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Sweden","iso":"SE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-11-13T17:25:15Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":8,"reasons":["seen:0","win:early"],"computed_at":"2026-11-13T21:06:57Z"},"pay":null,"html_url":"https://alion.io/job/kubo-senior-c-developer","json_url":"https://alion.io/job/kubo-senior-c-developer.json","meta":{"generated_at":"2026-11-13T21:06:57Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":42113,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-14T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4079540},"rest":"https://alion.io/mcp/rest/get_company?id=4079540"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fkubo-senior-c-developer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fkubo-senior-c-developer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fkubo-senior-c-developer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/kubo-senior-c-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkubo-senior-c-developer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4269940}},{"tool":"search_jobs","arguments":{"company":"kubo.io","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4269940},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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